Speaker



FIG. 1 is a front elevational view of a speaker showing our new design;

FIG. 2 is a right side elevational view thereof, a left side elevational view being a mirror image of the right elevational view;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a perspective view thereof. 

The ornamental design for a speaker, as shown and described. 